Question: In Exercises let and g represent differentiable functions such that # 0 and g # 0. Show that if and g are

In Exercises let ƒ and g represent differentiable functions such that ƒ" # 0 and g" # 0.

Show that if ƒ and g are concave upward on the interval (a, b), then ƒ + g is also concave upward on (a, b).

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